When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
After installing my Eddie intake, I noticed an exposed opening (hole) on the side of each head about midway, just above the intake. They appear to channel under the rocker.
I've looked closlely at Tom Monroe's "How to Rebuild Ford V8 Engines", and think I see them there, so hopefully I got it right.
That hole is a passage to keep the the egr passage from overheating, I think that is the wording in the book. That passage should be open, do not block it and you will be fine. There is a reference to this passage in the book, if you look close enough.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.